Erizal Sodikin
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Evaluasi Kerapatan Tanam dan Metode Pengendalian Gulma pada Budidaya Padi Tanam Benih Langsung di Lahan Sawah Pasang Surut Marpaung, Imelda S.; Parto, Yakup; Sodikin, Erizal
Jurnal Lahan Suboptimal Vol 2, No 1 (2013)
Publisher : Jurnal Lahan Suboptimal

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Abstract

Weed is one of limiting factors in the direct-seeded rice cultivation. Cost incurred by farmers to control weeds is still quite high. Various techniques of weed control need to be evaluated to obtain the most effective weed control in tidal land. The experiment was conducted in tidal land fields in the Telang  Sari village Tanjung Lago Sub District Banyuasin District during November 2012−March 2013. The experiment was arranged in a split plot design with planting density (K) as main plot and weeding methods (P) as sub plot. Five levels of planting density at 20, 40, 60, 80 and 100 kg rice seed/ha and four levels of weeding methods (manual weeding, dimethyl amine herbicide, penoxulam, and no weeding) were used in the experiment. The treatment was repeated 3 times and applied in 4×3m plot. Components of plant growth and yield of rice plants were measured and analyzed using Microsoft Excel and SPSS 17.0. The results showed that methods of weed control did not significantly affect plant height, plant biomass at 4 weeks after seeding and number of tillers, but significantly affect number of empty grain and filled grain per panicle. Both planting density and method of weed control significantly affect yield, but no significant interaction between treatments. Planting density did not significantly affect plant biomass from age 8 weeks after seeding. Yield of planting density at 80 kg seed/ha was not significantly different from the yield of 40−60 seed/ha. Method of weed control was significantly affecting the rice yield. Weed control can increase crop yields by 37.7%.
PENGARUH INTERVAL PENGENDALIAN GULMA DAN APLIKASI HERBISIDA TERHADAP PERTUMBUHAN GULMA DAN TANAMAN KARET TBM Zulkipli, Zulkipli; Yakup, Yakup; Sodikin, Erizal; Syawal, Yernelis
Jurnal Penelitian Karet JPK : Volume 34, Nomor 2, Tahun 2016
Publisher : Pusat Penelitian Karet - PT. Riset Perkebunan Nusantara

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Abstract

Metode pengendalian gulma yang tidak efektif akan menyebabkan dinamika gulma ke jenis yang lebih sulit dikendalikan dan tertundanya matang sadap 2-3 tahun. Penelitian ini untuk  mengkaji pertumbuhan gulma dan tanaman karet akibat pengaruh berbagai  interval pengendalian dan aplikasi herbisida pada kebun karet TBM. Penelitian dilaksanakan dari Januari 2013 sampai Juni 2014.  Rancangan penelitian Split Plot,  petak utama  adalah perlakuan interval  pengendalian gulma dan perlakuan herbisida sebagai anak petak dengan ulangan 3 kali. Hasil penelitian menunjukkan bahwa pertumbuhan  gulma daun lebar  lebih dominan  (SDR 52,76%) dari gulma sempit (SDR 47,24%) di awal penelitian (pra perlakuan). Bobot kering dan penutupan gulma lebih rendah, pada  interval pengendalian lebih singkat. Bobot kering gulma antar petak perlakuan berbeda nyata  pada Juni dan Desmber 2013.  Bobot kering dan penutupan gulma terendah  pada perlakuan  glifosat + metil metsulfuron  yang tertinggi pada perlakuan ditebas dan kontrol. Bobot kering dan penutupan gulma selalu berbeda nyata antara perlakuan glifosat + metil metsulfuron dengan perlakuan ditebas dan kontrol. Perlakuan herbisida campuran parakuat + metil metsulfuron menghasilkan pertumbuhan lilit batang karet lebih baik (17,9 cm) dibanding  perlakuan glifosat + metil metsulfuron (16,9 cm). Pertumbuhan lilit batang tanaman karet  sangat dipengaruhi  bobot kering  gulma dengan nilai koefisien diterminasi  R2  = 0,82. Dapat disimpulkan bahwa perlakuan herbisida  glifosat + metil metsulfuron lebih efektif menekan pertumbuhan gulma dan  pertumbuhan  lilit batang  karet sangat dipengaruhi bobot kering  gulma yang membentuk pola hubungan pertumbuhan negatif.